Compute Flesch Reading Ease and grade-level scores for any text.
Free · Runs in your browser · Last updated
Analyze text readability with Flesch Reading Ease, Flesch–Kincaid grade level, Gunning Fog and SMOG indexes. Identifies sentence and syllable counts.
All processing for Readability happens locally inside your browser using JavaScript. Your input is never uploaded to a server, logged, or shared with third parties.
Yes. Readability is completely free for both personal and commercial projects. There are no usage limits, no sign-up, and no premium tier.
All processing happens locally in your browser using JavaScript. Your input is never uploaded to our servers, logged, or shared with any third party.
Once the page has loaded, the tool runs entirely client-side. You can disconnect from the internet and it will keep working in the same browser tab.
Readability works in all modern browsers, including the latest versions of Chrome, Firefox, Safari, Edge, Brave, and Opera, on desktop and mobile.
No. Readability runs in any modern web browser with no installation, browser extension, or account required.